All numeric values that you specify as entry values or parameter values in a GPD file must be integers. Decimal points are not allowed, except within text strings.
Numeric values are assumed to be positive unless preceded by a minus sign.
Numeric values are assumed to be decimal unless preceded by 0x, in which case they are unsigned hexadecimal values.
The asterisk character (*) can be used to indicate either an infinite value or a "don't care" value, if applicable within the context of a particular GPD file entry.